Originally Posted by
gulliBell
There is such a device.
A far cheaper solution is the SPOT Messenger
The majority of gliders carry them and many GA aircraft. No certification required, just like mobile phones.
A slightly more expensive option is the Garmin Delorme unit which even allows you to send text messages via the Iridium network.
I am paranoid and carry one of each in my motorglider at all times flying all over remote areas of Australia.